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Finding the Fourth Proportional to 315,890.50, 435,928.08 and 172,651.52

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Solution

The fourth proportional to 315,890.50, 435,928.08 and 172,651.52 is: 238,258.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,890.50 : 435,928.08 = 172,651.52 : x
  2. Step 2: Convert to fraction form
    315,890.50/435,928.08 = 172,651.52/x
  3. Step 3: Cross multiply
    315,890.50x = 435,928.08 × 172,651.52
  4. Step 4: Simplify right side
    315,890.50x = 75,263,645,622.68
  5. Step 5: Solve for x
    x = 75,263,645,622.68/315,890.50
  6. Step 6: Final answer
    x = 238,258.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.